<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<input type="button" value="点我" onclick="show()" />
	</head>
	<body>
		<script>
		        var show = function(){
		        	alert(1);
		        };
		</script>
	</body>
</html>
